DA 1431 (DA345) at Helensville in 2017 on an excursion.
Type and origin
Power type
Diesel-electric
Builder
General Motors Diesel (Canada) Electro-Motive Division (USA) Clyde Engineering (Australia)
Model
EMD G12
Build date
1955 - 1967
Specifications
Configuration:
• UIC
A1A-A1A
Gauge
3 ft 6 in (1,067 mm)
Length
GMD/EMD 14.1 metres (46 ft 3 in) Clyde 14.6 metres (47 ft 11 in)
Adhesive weight
59.0 tonnes (58.1 long tons; 65.0 short tons)
Loco weight
GMD/EMD 81.0 tonnes (79.7 long tons; 89.3 short tons) Clyde 79.0 tonnes (77.8 long tons; 87.1 short tons)
Fuel type
Diesel
Prime mover
EMD 12-567C and EMD 12-567E
RPM range
835 rpm
Engine type
V12 Diesel engine
Aspiration
Roots type supercharger
Displacement
111.49 L (6,804 cu in)
Traction motors
Four EMD D19 or D29
Cylinders
12
Cylinder size
216 mm × 254 mm (8.5 in × 10.0 in)
Performance figures
Maximum speed
100 km/h (62 mph)
Power output
1,060 kW (1,420 hp)
Tractive effort
140 kN (31,000 lbf)
Career
Number in class
146
Numbers
DA 1400–1545 (original) DA 11–996 (TMS)
First run
1955 - 1967
Last run
1977 - 1989
Current owner
Museum of Transport & Technology Steam Incorporated Dean McQuoid Feilding and District Steam Rail Society
Disposition
85 rebuilt as DC Class 6 as DAA (defunct), 1 as DAR517 (withdrawn); 0 in service
The New Zealand DA class locomotive[nb 1] were a class of diesel-electric mainline locomotives operated on the New Zealand railway system between 1955 and 1989. Consisting of 146 locomotives, it was the most numerous class to ever operate in New Zealand, with five more than the AB class steam locomotive.
The class were A1A-A1A versions of the Electro-Motive Diesel (EMD) G12 model, with the design altered slightly to run on New Zealand's 3 ft 6 in (1,067 mm) rail system, and fit the small loading gauge. They were introduced between 1955 and 1967 in three phases[1] and were the first class of diesel locomotives to seriously displace steam traction.
Between 1978 and 1983, 85 locomotives were rebuilt as the DC class, of which some are still in use. All but one of the remainder were withdrawn by 1989, with six preserved.[2] The last locomotive was refitted for shunting duties and was rebuilt as DAR 517.
Cite error: There are <ref group=nb> tags on this page, but the references will not show without a {{reflist|group=nb}} template (see the help page).
^Palmer & Stewart 1965, p. 155.
^"Class "DA" Locomotives". New Zealand Railway Observer. 46 (3): 118. Spring 1989. ISSN 0028-8624.
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